St. Patrick's Day tradition: Why Chicago dyes its river green

St. Patrick’s Day is just around the corner, and Chicago is already celebrating Irish heritage in a big way. Did you know that about 40 pounds of green dye are dumped into the river each year? #scrippsnews #stpatricksday
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[@JohnDoe-gg6kc]

Where is gretta?

[@pricelessppp]

In jail.

[@funfact8660]

Obviously to hide the usual blood red color of the river

[@aptspikeybird1005]

lol

[@BeavKsam]

👍

[@Silverstar129]

Ya think that will affect the trout population?

[@PaulAllen786]

This is really dumb, my gosh

[@Silverstar129]

@@PaulAllen786 thats the joke